【摘要】：以黃土高原區(qū)土壤為研究對象,通過土壤水分特征曲線與土壤基本理化參數(shù)系列試驗,獲得了Van-Genuchten模型參數(shù)的實測數(shù)據(jù)樣本,建立了土壤基本理化參數(shù)與Van-Genuchten模型參數(shù)之間一一對應(yīng)的關(guān)系,創(chuàng)建了以土壤黏粒含量、粉粒含量、容重、有機質(zhì)含量、全鹽量為輸入變量,Van-Genuchten模型參數(shù)為輸出變量的非線性傳輸函數(shù)預(yù)報模型。研究表明:以土壤黏粒含量、粉粒含量、容重、有機質(zhì)含量、全鹽量為輸入變量,對Van-Genuchten模型參數(shù)進行非線性預(yù)報是可行的;所建立的非線性預(yù)報模型精度較高,預(yù)測樣本下Van-Genuchten模型參數(shù)α的實測值與預(yù)測值的相對誤差的平均值為9.66%,參數(shù)n的實測值與預(yù)測值的相對誤差的平均值為6.83%,檢驗樣本參數(shù)α的實測值與預(yù)測值的相對誤差的平均值為7.34%,參數(shù)n的實測值與預(yù)測值的相對誤差的平均值為5.45%。研究成果為黃土地區(qū)提供一種便捷獲取土壤水分特征曲線的途徑。
[Abstract]:Taking the soil of Loess Plateau as the research object, the measured data samples of Van-Genuchten model parameters were obtained through the series experiments of soil moisture characteristic curve and basic physical and chemical parameters of soil. The one-to-one relationship between the basic physical and chemical parameters of soil and the parameters of Van-Genuchten model was established. The input variables were clay content, silt content, bulk density, organic matter content and total salt content. The Van-Genuchten model is a nonlinear transmission function prediction model with output variables. The results show that it is feasible to predict the parameters of Van-Genuchten model with clay content, silt content, bulk density, organic matter content and total salt content as input variables. The accuracy of the established nonlinear prediction model is high, and the average relative error between the measured value and the predicted value of the Van-Genuchten model parameter 偽 is 9.66. The average value of the relative error between the measured value and the predicted value of parameter n is 6.83, and the average of the relative error between the measured value and the predicted value of the test sample parameter 偽 is 7.34. The average relative error between the measured value and the predicted value of parameter n is 5.45. The research results provide a convenient way to obtain soil water characteristic curve in loess area.
【作者單位】： 太原理工大學(xué)水利科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(40671081) 山西省農(nóng)田節(jié)水技術(shù)開發(fā)服務(wù)推廣站項目
【分類號】：S152.7

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本文編號：2336403